/* Copyright 2009 Requirement Management System
 * 
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.mags.cryptography.common;

import org.apache.commons.codec.binary.Hex;
import java.security.MessageDigest;

/**
 * 
 * @author Mario Gaitan
 *
 */
public class Sha1CryptoText implements ICryptoText {
	public String decrypt(String text) {
		throw new RuntimeException("you can't decrypt with hash algorithm");
	}
	private final MessageDigest getMessageDigest() {
		try {
			return MessageDigest.getInstance("SHA-1");
		} catch (Exception e) {
			throw new RuntimeException(e.getMessage());
		}
	}	
	public String encrypt(String text) {
		byte[] digest = getMessageDigest().digest(text.getBytes());
		return new String(Hex.encodeHex(digest));
	}
}
